Large quantity of high resolution e-book page images

HalBenHB · 02-18-2024, 09:40 AM

I have 1400+ png files of pages. Images are not scanned, they are probably computer generated because there is no color corruption, distortion etc. They are probably from an official e-book version of a book. They are all in 1519 x 2459 resolution (I believe the book itself has 105 x 170 mm papers).

I tried to merge them by Adobe Acrobat Pro, but after merging I couldn't save the final pdf. It somehow broke save function. I tried a couple of time. Try to do it by halves. First 700 pages can saved but second half broke it again.
I tried to merge them by Abbyy FineReader, however, no matter which setting I tried, it produced a pdf with inconsistent page sizes (even though all images are in same resolution) and sometimes zoomed in for some pages.
I finally merged them by PDF Shaper Professional. It gave me a 2GB+ pdf file with all pages having same size which is 401.9 x 650.6 mm (for comparison, A4 is 210 x 297 mm). Then, I processed this pdf file with Abbyy and convert it to searchable PDF. Then, I compressed it by Acrobat Pro and finally have 250MB+ searchable pdf.

This pdf is still heavy. Abbyy crashes when I try to convert it to epub. MS Word can't process both size and (after splitting the pdf) page size. Kindle and Google Play Books not accepting because of size.

I need to lower its page size to make it lighter. However, every solution I tried produced image only pdfs and deleted OCR data. I can again scan this by Abbyy to make it searchable but I suppose it will have less correct OCR since I lowered the quality of images (pages). I want to have a light and searchable pdf of this book and then further convert it to epub so I can read it easily from my phone. There is no graphics in the pages as far as I saw, except for the first cover page, it is a anthology book for short stories. I'm using Windows 10, the OCR language is Turkish but the book is old and have old words so dictionary based OCRs work more inaccurately. What do you suggest I do?

Turtle91 · 02-18-2024, 07:25 PM

Assuming there are no copyright issues, just break it up into smaller sections… maybe 200 pages at a time. Merge, OCR, save as epub… then repeat for each of the other sections. Then combine the individual ePubs into a single ePub.

Sirtel · 02-22-2024, 09:06 AM

As you said those images are from an official ebook version, why not just buy that and save yourself all this headache?

JSWolf · 02-22-2024, 10:18 AM

What book is this that you have images of?

02-18-2024, 09:40 AM	#1
HalBenHB Junior Member Posts: 1 Karma: 10 Join Date: Feb 2024 Device: Smart phone	Large quantity of high resolution e-book page images I have 1400+ png files of pages. Images are not scanned, they are probably computer generated because there is no color corruption, distortion etc. They are probably from an official e-book version of a book. They are all in 1519 x 2459 resolution (I believe the book itself has 105 x 170 mm papers). I tried to merge them by Adobe Acrobat Pro, but after merging I couldn't save the final pdf. It somehow broke save function. I tried a couple of time. Try to do it by halves. First 700 pages can saved but second half broke it again. I tried to merge them by Abbyy FineReader, however, no matter which setting I tried, it produced a pdf with inconsistent page sizes (even though all images are in same resolution) and sometimes zoomed in for some pages. I finally merged them by PDF Shaper Professional. It gave me a 2GB+ pdf file with all pages having same size which is 401.9 x 650.6 mm (for comparison, A4 is 210 x 297 mm). Then, I processed this pdf file with Abbyy and convert it to searchable PDF. Then, I compressed it by Acrobat Pro and finally have 250MB+ searchable pdf. This pdf is still heavy. Abbyy crashes when I try to convert it to epub. MS Word can't process both size and (after splitting the pdf) page size. Kindle and Google Play Books not accepting because of size. I need to lower its page size to make it lighter. However, every solution I tried produced image only pdfs and deleted OCR data. I can again scan this by Abbyy to make it searchable but I suppose it will have less correct OCR since I lowered the quality of images (pages). I want to have a light and searchable pdf of this book and then further convert it to epub so I can read it easily from my phone. There is no graphics in the pages as far as I saw, except for the first cover page, it is a anthology book for short stories. I'm using Windows 10, the OCR language is Turkish but the book is old and have old words so dictionary based OCRs work more inaccurately. What do you suggest I do?

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02-18-2024, 07:25 PM	#2
Turtle91 A Hairy Wizard Posts: 3,095 Karma: 18727053 Join Date: Dec 2012 Location: Charleston, SC today Device: iPhone 11/X/6/iPad 1,2,Air & Air Pro/Surface Pro/Kindle PW & Fire	Assuming there are no copyright issues, just break it up into smaller sections… maybe 200 pages at a time. Merge, OCR, save as epub… then repeat for each of the other sections. Then combine the individual ePubs into a single ePub.

02-22-2024, 09:06 AM	#3
Sirtel Grand Sorcerer Posts: 10,144 Karma: 224760044 Join Date: Jan 2014 Location: Estonia Device: Kobo Sage & Libra 2	As you said those images are from an official ebook version, why not just buy that and save yourself all this headache?

02-22-2024, 10:18 AM	#4
JSWolf Resident Curmudgeon Posts: 73,998 Karma: 128903378 Join Date: Nov 2006 Location: Roslindale, Massachusetts Device: Kobo Libra 2, Kobo Aura H2O, PRS-650, PRS-T1, nook STR, PW3	What book is this that you have images of?